From: David Brown <david.brown@hesbynett.no>
To: Christoph Anton Mitterer <calestyo@scientia.net>
Cc: linux-raid@vger.kernel.org
Subject: Re: question about the best suited RAID level/layout
Date: Sun, 07 Jul 2013 16:08:17 +0200 [thread overview]
Message-ID: <51D97651.8060704@hesbynett.no> (raw)
In-Reply-To: <1373123051.5217.19.camel@fermat.scientia.net>
On 06/07/13 17:04, Christoph Anton Mitterer wrote:
> On Sat, 2013-07-06 at 03:36 -0500, Stan Hoeppner wrote:
>>>> hot/warm/cold spares in the chassis.
>>>> This simply degrades performance.
>>> Why should it? If the spare is unused?
>> The answer is rather obvious. If spares are in the chassis one has
>> fewer active array spindles.
> Sorry... still don't get it...
> When you have another drive in the chassis... which is not actively used
> by the RAID, but just waiting as a hot spare for a failing device and
> rebuild becoming necessary...
> Apart from power consumption and more heat... how should that affect the
> read/write performance of the RAID?
>
I think the point is that you have a slot in your chassis that is not
being used actively. If you have five disk bays, then you will get
better performance with 5 disks in your array and a spare on the shelf
beside it than with 4 disks in the array and a spare in the chassis.
next prev parent reply other threads:[~2013-07-07 14:08 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-04 18:17 question about the best suited RAID level/layout Christoph Anton Mitterer
2013-07-04 21:43 ` Phil Turmel
2013-07-04 22:58 ` Christoph Anton Mitterer
2013-07-05 1:07 ` Brad Campbell
2013-07-06 0:36 ` Christoph Anton Mitterer
2013-07-06 5:29 ` Brad Campbell
2013-07-06 14:49 ` Christoph Anton Mitterer
2013-07-07 6:36 ` Brad Campbell
2013-07-06 7:40 ` Piergiorgio Sartor
2013-07-06 14:52 ` Christoph Anton Mitterer
2013-07-05 1:12 ` Stan Hoeppner
2013-07-06 0:46 ` Christoph Anton Mitterer
2013-07-06 8:36 ` Stan Hoeppner
2013-07-06 15:04 ` Christoph Anton Mitterer
2013-07-06 15:41 ` Matt Garman
2013-07-07 14:08 ` David Brown [this message]
2013-07-07 16:45 ` Stan Hoeppner
2013-07-07 17:26 ` Christoph Anton Mitterer
2013-07-09 15:50 ` Stan Hoeppner
2013-07-05 13:36 ` Phil Turmel
2013-07-06 1:11 ` Christoph Anton Mitterer
2013-07-06 2:19 ` Phil Turmel
2013-07-06 17:55 ` Christoph Anton Mitterer
2013-07-07 12:46 ` Bernd Schubert
2013-07-07 17:39 ` Christoph Anton Mitterer
2013-07-05 11:10 ` David Brown
2013-07-06 0:55 ` Christoph Anton Mitterer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=51D97651.8060704@hesbynett.no \
--to=david.brown@hesbynett.no \
--cc=calestyo@scientia.net \
--cc=linux-raid@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).